Hiram thompson



@atten tatrs pgatmt @fitte HIRAM THOMPSON, OE WORCESTER, MASSACHUSETTS, ASSIGNOR IO R.

BALL da CO., `OF SAME PLAGE.

vLen-@r3 Patent No. 82,257, ma September ,15, 1868.

IMPROVEMENT IN SAWING-MAGHINES..

dige Stimmt rftmh tu im tlgtst Enters what sur milking part ai the sans.

KNOW VALL MENEY THESE PRESENTS;

That LHIRAM THOMPSON, ofthe city and county of Worcester, and Commonwealth of Massachusetts, i

have invented certain new and useful Improvements in'Sawing-Machines; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, in which Figure 1 represents an end view of my improved sawing-machine.

Figure 2 represents a front view'of the same.

Figure 3 represents a section on line' A B, fig. 2; and

Figure 4 represents a sectonon line C' D, iig. 1. Y

To enable those skilled in the art to which my invention belongs to make and use the same, I will proceed to describe it more in detail'. -i

The nature of my invention .consists in the particular mode of supporting both ends of one or more ci' the saw-arbore, as shown in thedrawngs- Also, in the use of abinding-pulley in combination with the mechanism for supporting one or more saw-arbors, as shown in the drawings. Also, in the peculiar mode of making the metal end-pieces of the main frame,V whereby the driving-shaft can be supported free from-the door, and in a secure and-convenient position upon themain frame, as shown in the drawings. Also, in the peculiar mode of making and supporting the side-guide, as will be'hereafter more fully explained.

In the drawings,`A A arethe metal end-pieces of' the main frame, united by cross-pieces'B and C.

D is the top or sawtable,.iu.pcn which the material is placed to be sawed, and throughwhich the sawswork.

The saw-arbore E E are supported in bearings a a cz a, fastened to the vdisks F F, which are in turn fastened to the shaft or spindle Gr, to the outer end of which a' gear, H, is secured, and which gear His operated by a worm-gear, I, on the crank-shaft J. I

The disks F F are provided with shoulders or grooves 1 1, which fit corresponding grooves or shoulders 2 2, formed in the stationary disks K K,the outer disk, K, being supported by theend-piece of the frame',k

while the inner one is supported by the cross-piece L.

Disks K are also made fast at the top, whereby the disks F are supported in a secure and firm manner between the disks K, while at the same time they can be revolved to bring either saw Vabove the top of the table, as shown, for use.

The saw-arbors are provided with driving-pulleys M, around which the driving-belt N passes from the pulley O on the main driving-shaft P, which is supported in bearings in the downwardly-projecting arms Q, Q of the end-pieces A A, thus being free from the door upon which the saw-frame stands.

R is the sliding part ofthe saw-table, having attached to its top the usual mitre-guide, S, while upon the stationary part, R', of the saw-table, is supported the adjustable guide S', which has an ear-piece, m, fastened at each end, into which screws n are screwed, the screws passing through the inclined slots o in the stands p, fastened to the slide part T, which can be moved in or out, and then fastened byta thumb-screw, s, in theusual manner. i

The guide S can be set at any desired angle, and then securedin such position by means of the screws 1t. An illustrationl is given in red lines, fig. 4. Y'

This is a very convenient arrangement, since it enables the guide S to be set in a very simple manner to 'fit the bevel or inclined sides oi' articles or material to be sawed.

The device is simple, strong, and not liable to become deranged by use.

When the disks F Fare turned to change the position of the saws, as indicated in red lines, iig. 3, the b elt N becomes slack during the operation of reversing the position of the saws, se much so as to be liable to become displaced. To obviate this diliiculty,I arrange a binding-pulley, U, shown in full and dotted lines, figs. 2 and 3, whereby the slack of beltNwill be taken up, in a measure, while the positions ofthe saws are being changed, as indicated in red lines, fig. 3. l

It will'be observed that the 'saws may run close together, since the disks F have no centr-ai supports to interfere with the safiv'fs or the gear H.

My improved serving-,machine has been tested praet'icelly,` and has been found to work exceedingly well.

Having described my improved sawing-machine, wiiatI desire .to secure by Letters Patent, isA

1. V-The combination and arrangement, with thesaw-arbors E; of the movable disks F F, substantieily as and for-the purposes set forth. l

2. T he arrangement of the binding-'pulley U, in relation to the beitN, 'pulley O, and saw-arbore E'E, substantially as and for the purposes set forth. v f

l lHIRAM THOMPSON.

E, or either, and the stationary disks K K,

Witnesses:

THos. H. DODGE, 4 D. L. MILLER.

claim therein as'new and of my own invention, and 

